Is there currently an API for this?

Hmm, I can’t get any of those to show me what I need.

Maybe the fact that I have 1,238 reviews is screwing them all up…

@matt_llvw
This is what I’m getting from yours:

@mgrice
I finally got yours to work:
I had to use @Inserio 's rewritten version of the script ([Userscript]: WaniKani Ultimate Timeline - #1162 by Inserio) to get it to work and then change the setting:
Review Details Summary to Item Type
(In case anyone else wants to use this as well)